109 lines
3.0 KiB
Go
109 lines
3.0 KiB
Go
package logmower
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import (
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"context"
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"log"
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"time"
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ms "git.k-space.ee/k-space/logmower-shipper/pkg/mongo_struct"
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"github.com/jtagcat/util"
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prom "github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promauto"
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"go.mongodb.org/mongo-driver/mongo"
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)
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var (
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promShipperQueued = promauto.NewGaugeVec(prom.GaugeOpts{
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Namespace: PrometheusPrefix,
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// Subsystem: "shipper",
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Name: "shipper_record", // "queued",
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Help: "Log records in queue to be batched and sent to database",
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}, []string{"filename"})
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promShipperDbSent = promauto.NewCounterVec(prom.CounterOpts{
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Namespace: PrometheusPrefix,
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// Subsystem: "shipper",
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Name: "record", // "sent",
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Help: "Log records successfully committed to database",
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}, []string{"filename"})
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promShipperBatchSizeResult = promauto.NewHistogram(prom.HistogramOpts{
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Namespace: PrometheusPrefix,
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// Subsystem: "shipper",
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Name: "bulk_submission_message", // "items_in_batch"
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Help: "Batch size for database submissions",
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Buckets: []float64{1, 5, 10, 50, 100, 500, 1000, 5000, 10000},
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})
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promShipperDbSendError = promauto.NewCounterVec(prom.CounterOpts{
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Namespace: PrometheusPrefix,
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// Subsystem: "shipper",
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Name: "insertion_error", // "errors",
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Help: "Errors while submitting to database", // TODO:
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}, []string{"filename"})
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promShipperSynced = promauto.NewGaugeVec(prom.GaugeOpts{
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Namespace: PrometheusPrefix,
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Subsystem: "shipper",
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Name: "batches_synced",
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Help: "All batches available have been committed database (0 or 1)",
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}, []string{"filename"})
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)
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const (
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MaxBatchItems = 10000
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MaxBatchTime = 5 * time.Second
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)
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type queueT <-chan ms.Record
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func (queue queueT) sender(db *mongo.Collection, metricsFilename string) {
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batched := make(chan []ms.Record)
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// batcher and queue metrics
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go func() {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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go func() {
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for {
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promShipperQueued.WithLabelValues(metricsFilename).Set(float64(
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len(queue)))
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timer := time.NewTimer(time.Second)
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select {
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case <-ctx.Done():
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return
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case <-timer.C:
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}
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}
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}()
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util.Batch(MaxBatchItems, MaxBatchTime, queue, batched)
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// returns when sendQueue is closed
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}()
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for {
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promShipperSynced.WithLabelValues(metricsFilename).Set(1)
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batch, ok := <-batched
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if !ok {
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return
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}
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promShipperBatchSizeResult.Observe(float64(len(batch)))
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promShipperSynced.WithLabelValues(metricsFilename).Set(0)
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var batchBson []interface{} // mongo does not like typing
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for _, b := range batch {
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batchBson = append(batchBson, b.ToBson())
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}
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result, err := db.InsertMany(mongoTimeoutCtx(context.Background()), batchBson, nil)
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if err != nil {
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promShipperDbSendError.WithLabelValues(metricsFilename).Add(1)
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log.Printf("failure in batch submit to database: %e", err) // TODO: add some selective retry here or something, better error handling
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continue
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}
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promShipperDbSent.WithLabelValues(metricsFilename).Add(float64(
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len(result.InsertedIDs)))
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}
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}
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